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Fluctuating Current Control Method for a
PMSM Along Constant Torque Contours
Junwoo Kim, Student Member, IEEE, Ilsu Jeong,
Student Member, IEEE, Kilho Lee,
and Kwanghee Nam, Member, IEEE
報告者：翁瑞侑
Introduction
洗衣機
主要應用於
永磁同
步馬達
空調
冰箱
但家庭實用程序是一個單相系統，
使得脈動整流電流供給的直流鏈路反相器[1]。
另一方面，到逆變器的負載電流DC是在直流母線側。
由於輸入和輸出電流的模式超過直流母線電容的不同，
將差額流入直流鏈路電容器，使得電壓波動，如果電容不足夠大。
Overall System Configuration (整體系統配置)
圖1、一個典型的家用器具的驅動電路，用於空調器，洗衣機，冰箱等。
表1、變換器逆變器系統的規範
PMSM Model
內部永磁同步電機（IPMSM）電壓方程和轉矩方程
由下列方程式表示
PMSM Problem Statements
The objective and conditions of this study is
summarized as:
1) the grid source is a single-phase ac and the
load is a threephase PMSM;
2) to keep the unity power factor in the converter;
3) to maintain the dc-link voltage constant;
4) not to allow torque pulsation in the motor shaft.
模擬電流和電壓波形分別示意圖。
本研究的目標和和條件下包括為：
1）在網格源是單相AC和負載是三相
永磁同步電機;
2）保持在所述轉換器中的功率因數;
3）維持直流母線電壓恆定的;
4）不要讓電機軸轉矩脈動。
OSCILLATING CURRENT CONTROL METHOD
ALONG A CONSTANT TORQUE LINE
Power Balancing at the DC Link
Analytic Solution for Generating a Reactive Power
Minimum Capacitance Estimation
CONSTANT TORQUE TRACKING ALGORITHM
(常數轉力矩跟踪算法)
IPMSM的參數
SIMULATION AND EXPERIMENTAL RESULTS
Experimental Results
CONCLUSION
 By matching the fluctuating shape of the motor power with that of the
converter power, it was possible to minimize the dclink capacitor voltage. This
method possibly reduces the dc-link capacitance. In this study, it was
proposed to use the reactive power components of the IPMSM to counteract
the converter power fluctuation. A distinguished feature is to make the current
along a constant torque line in accordance with the input power ripple.
Therefore, the torque ripple was minimized even when the currents oscillated.
The oscillating range reduces as the motor torque increases. The torque ripples
in experimental results were caused by imperfect matching due to the limits in
current oscillation range and in current control bandwidth. The bounds of the
current ripple could be solved by utilizing the Ferrari’s method. To facilitate a
practical use, a recursive algorithm was proposed. The effectiveness of the
proposed method was demonstrated through simulation and experimental
results.